Lightweight TiC–(Fe–Al) ceramic–metal composites made in situ by pressureless melt infiltration

Corson L. Cramer; Makayla S. Edwards; Jacob W. McMurray; Amy M. Elliott; Richard A. Lowden

doi:10.1007/s10853-019-03792-2

Lightweight TiC–(Fe–Al) ceramic–metal composites made in situ by pressureless melt infiltration

Corson L. Cramer, Makayla S. Edwards, Jacob W. McMurray, Amy M. Elliott, Richard A. Lowden

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Lightweight ceramic–metal (cermet) composites combine stiffness and hardness with fracture toughness and ductility. TiC and Al are ideal pairs among lightweight cermet composites because of their relatively high strength-to-weight ratios, but these materials are hard to process in solid state or with Al melt infiltration without making an aluminum carbide phase, which is detrimental to mechanical properties. In this research, Fe is added to a TiC powder preform to reduce the activity of Al with TiC during Al melt infiltration and to aid in pressing TiC preforms, making a lightweight TiC–(Fe–Al) composite while avoiding other, unwanted phases. The composites are made by first pressing TiC powder mixed with Fe followed by Al melt infiltration; the result is a composite with high TiC content in a two-phase matrix, both of which are Fe–Al-based. The composite has low density, low porosity, high hardness, no detectable Al₄C₃ phase with X-ray diffraction and retains shape well during infiltration.

Original language	English
Pages (from-to)	12573-12581
Number of pages	9
Journal	Journal of Materials Science
Volume	54
Issue number	19
DOIs	https://doi.org/10.1007/s10853-019-03792-2
State	Published - Oct 15 2019

Funding

The authors would like to thank Olivia Shafer for assistance in editing. Research sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. The authors would like to thank Olivia Shafer for assistance in editing. Research sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Funders	Funder number
U.S. Department of Energy
Advanced Manufacturing Office	DE-AC05-00OR22725 with UT-Battelle
Office of Energy Efficiency and Renewable Energy

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title = "Lightweight TiC–(Fe–Al) ceramic–metal composites made in situ by pressureless melt infiltration",

abstract = "Lightweight ceramic–metal (cermet) composites combine stiffness and hardness with fracture toughness and ductility. TiC and Al are ideal pairs among lightweight cermet composites because of their relatively high strength-to-weight ratios, but these materials are hard to process in solid state or with Al melt infiltration without making an aluminum carbide phase, which is detrimental to mechanical properties. In this research, Fe is added to a TiC powder preform to reduce the activity of Al with TiC during Al melt infiltration and to aid in pressing TiC preforms, making a lightweight TiC–(Fe–Al) composite while avoiding other, unwanted phases. The composites are made by first pressing TiC powder mixed with Fe followed by Al melt infiltration; the result is a composite with high TiC content in a two-phase matrix, both of which are Fe–Al-based. The composite has low density, low porosity, high hardness, no detectable Al4C3 phase with X-ray diffraction and retains shape well during infiltration.",

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AU - Cramer, Corson L.

AU - Edwards, Makayla S.

AU - McMurray, Jacob W.

AU - Elliott, Amy M.

AU - Lowden, Richard A.

PY - 2019/10/15

Y1 - 2019/10/15

N2 - Lightweight ceramic–metal (cermet) composites combine stiffness and hardness with fracture toughness and ductility. TiC and Al are ideal pairs among lightweight cermet composites because of their relatively high strength-to-weight ratios, but these materials are hard to process in solid state or with Al melt infiltration without making an aluminum carbide phase, which is detrimental to mechanical properties. In this research, Fe is added to a TiC powder preform to reduce the activity of Al with TiC during Al melt infiltration and to aid in pressing TiC preforms, making a lightweight TiC–(Fe–Al) composite while avoiding other, unwanted phases. The composites are made by first pressing TiC powder mixed with Fe followed by Al melt infiltration; the result is a composite with high TiC content in a two-phase matrix, both of which are Fe–Al-based. The composite has low density, low porosity, high hardness, no detectable Al4C3 phase with X-ray diffraction and retains shape well during infiltration.

AB - Lightweight ceramic–metal (cermet) composites combine stiffness and hardness with fracture toughness and ductility. TiC and Al are ideal pairs among lightweight cermet composites because of their relatively high strength-to-weight ratios, but these materials are hard to process in solid state or with Al melt infiltration without making an aluminum carbide phase, which is detrimental to mechanical properties. In this research, Fe is added to a TiC powder preform to reduce the activity of Al with TiC during Al melt infiltration and to aid in pressing TiC preforms, making a lightweight TiC–(Fe–Al) composite while avoiding other, unwanted phases. The composites are made by first pressing TiC powder mixed with Fe followed by Al melt infiltration; the result is a composite with high TiC content in a two-phase matrix, both of which are Fe–Al-based. The composite has low density, low porosity, high hardness, no detectable Al4C3 phase with X-ray diffraction and retains shape well during infiltration.

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Lightweight TiC–(Fe–Al) ceramic–metal composites made in situ by pressureless melt infiltration

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